RAND finds nearly half of all caregivers of post-9/11 veterans have had to take time off work

Megan Stewart follows her husband, Tim, around the house in Coloma, Mich., trying to make sure he remembers things like putting on his jacket before going outside or turning off the stove after making dinner.

"I still don't do it," said Tim, a 29-year-old former Army sergeant who suffered a traumatic brain injury and post-traumatic stress disorder from a grenade attack during a firefight in Mosul, Iraq, in 2005. "One...